Boyle, Robert, New experiments physico-mechanicall, touching the spring of the air and its effects, 1660

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              ſmoke, which ſeem'd to move freely up
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              and down, and upon the letting in the Air
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              at the Stop-cock began to circulate much
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              faſter then before. </s>
              <s>We wonld have made
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              more obſervations concerning this Flame,
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              but that of two or three attempts we
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              afterwards made to repeat the kindling of
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              Powder, not any one ſucceeded; and
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              we have not the leaſure to dwell long up­
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              on one kinde of Tryals. </s>
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              <s>TO theſe Experiments concerning Fire
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              we added another, which, though it ſuc­
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              ceded not, may perhaps without imper­
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              tinency be recorded: partly becauſe that
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              (as we have in another Treatiſe amply de­
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              clar'd) it is uſefull to recite what Experi­
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              ments miſcarry as well as what ſucceed.
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              <s>And partly alſo becauſe it is very poſſible
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              that what we endeavored in vaine, may be
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              performed by Your Lordſhip, or ſome
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              other
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              Virtuoſo
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              that ſhall have ſlancker
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              Veſſells then we had, and more Sunny
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              dayes then the preſent Winter allows
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              us. </s>
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              Experi­
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              ment
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              15.</s>
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              <s>We convey'd then into one of our ſmall
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              Receivers a piece of matter combuſtible,
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              dry and black (experience declaring things </s>
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